Bug#1113136: libdecaf: FTBFS with CMake 4

Sun Aug 31 23:57:52 BST 2025

Source: libdecaf
Version: 1.0.2-2
Severity: serious
User: cmake at packages.debian.org
Usertags: cmake-4
Tags: ftbfs, forky, sid

Dear maintainer,

During a test rebuild for CMake 4, libdecaf failed to rebuild.

Log Summary:
-------------------------------------------------------------------------------
[...]
Standards-Version: 4.6.1
Vcs-Browser: https://salsa.debian.org/pkg-voip-team/linphone-stack/libdecaf
Vcs-Git: https://salsa.debian.org/pkg-voip-team/linphone-stack/libdecaf.git
Build-Depends: cmake, debhelper-compat (= 13), python3
Build-Depends-Indep: doxygen <!nodoc>
Package-List:
 libdecaf-dev deb libdevel optional arch=any
 libdecaf-doc deb doc optional arch=all profile=!nodoc
 libdecaf0 deb libs optional arch=any
Checksums-Sha1:
 e14f01ed859585bfc5f514ab68531a436e2054db 231996 libdecaf_1.0.2.orig.tar.gz
 7d7badc4d4d048498228313fc4aa8efc41405c65 5276 libdecaf_1.0.2-2.debian.tar.xz
Checksums-Sha256:
 96ce1f59bfc6257748d44dffeb40684c886a0742a8ed10524201e6ad95598552 231996 libdecaf_1.0.2.orig.tar.gz
 615001814f3d1d9a724e631743e899f061059eb649c9f22d9cb61ce8d799c464 5276 libdecaf_1.0.2-2.debian.tar.xz
Files:
 50d59a0d1428e91734b2aa7c1e586980 231996 libdecaf_1.0.2.orig.tar.gz
 5fb6e1e46687d5c8c49c27c976916aa6 5276 libdecaf_1.0.2-2.debian.tar.xz

-----BEGIN PGP SIGNATURE-----
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=aSk0
-----END PGP SIGNATURE-----

dpkg-source: warning: cannot verify inline signature for ./libdecaf_1.0.2-2.dsc: no acceptable signature found
dpkg-source: info: extracting libdecaf in /build/reproducible-path/libdecaf-1.0.2
dpkg-source: info: unpacking libdecaf_1.0.2.orig.tar.gz
dpkg-source: info: unpacking libdecaf_1.0.2-2.debian.tar.xz
dpkg-source: info: using patch list from debian/patches/series
dpkg-source: info: applying fix-cmake-install-paths.patch
dpkg-source: info: applying fix-declarations.patch
dpkg-source: info: applying fix-attribute-deprecated-decl.patch

Check disk space
----------------

Sufficient free space for build

User Environment
----------------

APT_CONFIG=/var/lib/sbuild/apt.conf
HOME=/sbuild-nonexistent
LANG=C.UTF-8
LC_ALL=C.UTF-8
LOGNAME=sbuild
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
SHELL=/bin/sh
USER=sbuild

dpkg-buildpackage
-----------------

Command: dpkg-buildpackage --sanitize-env -us -uc -b
dpkg-buildpackage: info: source package libdecaf
dpkg-buildpackage: info: source version 1.0.2-2
dpkg-buildpackage: info: source distribution unstable
dpkg-buildpackage: info: source changed by Bernhard Schmidt <berni at debian.org>
 dpkg-source --before-build .
dpkg-buildpackage: info: host architecture arm64
 debian/rules clean
dh clean --buildsystem=cmake
   dh_auto_clean -O--buildsystem=cmake
   dh_autoreconf_clean -O--buildsystem=cmake
   dh_clean -O--buildsystem=cmake
 debian/rules binary
dh binary --buildsystem=cmake
   dh_update_autotools_config -O--buildsystem=cmake
   dh_autoreconf -O--buildsystem=cmake
   dh_auto_configure -O--buildsystem=cmake
	cd obj-aarch64-linux-gnu && DEB_PYTHON_INSTALL_LAYOUT=deb PKG_CONFIG=/usr/bin/pkg-config cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=None -DCMAKE_INSTALL_SYSCONFDIR=/etc -DCMAKE_INSTALL_LOCALSTATEDIR=/var -DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON -DCMAKE_FIND_USE_PACKAGE_REGISTRY=OFF -DCMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY=ON -DFETCHCONTENT_FULLY_DISCONNECTED=ON -DCMAKE_INSTALL_RUNSTATEDIR=/run -DCMAKE_SKIP_INSTALL_ALL_DEPENDENCY=ON "-GUnix Makefiles" -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_INSTALL_LIBDIR=lib/aarch64-linux-gnu ..
CMake Error at CMakeLists.txt:8 (cmake_minimum_required):
  Compatibility with CMake < 3.5 has been removed from CMake.

  Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
  to tell CMake that the project requires at least <min> but has been updated
  to work with policies introduced by <max> or earlier.

  Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.

-- Configuring incomplete, errors occurred!
	cd obj-aarch64-linux-gnu && tail -v -n \+0 CMakeCache.txt
==> CMakeCache.txt <==
# This is the CMakeCache file.
# For build in directory: /build/reproducible-path/libdecaf-1.0.2/obj-aarch64-linux-gnu
# It was generated by CMake: /usr/bin/cmake
# You can edit this file to change values found and used by cmake.
# If you do not want to change any of the values, simply exit the editor.
# If you do want to change a value, simply edit, save, and exit the editor.
# The syntax for the file is as follows:
# KEY:TYPE=VALUE
# KEY is the name of a variable in the cache.
# TYPE is a hint to GUIs for the type of VALUE, DO NOT EDIT TYPE!.
# VALUE is the current value for the KEY.

########################
# EXTERNAL cache entries
########################

//No help, variable specified on the command line.
CMAKE_BUILD_TYPE:UNINITIALIZED=None

//No help, variable specified on the command line.
CMAKE_EXPORT_NO_PACKAGE_REGISTRY:UNINITIALIZED=ON

//No help, variable specified on the command line.
CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY:UNINITIALIZED=ON

//Value Computed by CMake.
CMAKE_FIND_PACKAGE_REDIRECTS_DIR:STATIC=/build/reproducible-path/libdecaf-1.0.2/obj-aarch64-linux-gnu/CMakeFiles/pkgRedirects

//No help, variable specified on the command line.
CMAKE_FIND_USE_PACKAGE_REGISTRY:UNINITIALIZED=OFF

//No help, variable specified on the command line.
CMAKE_INSTALL_LIBDIR:UNINITIALIZED=lib/aarch64-linux-gnu

//No help, variable specified on the command line.
CMAKE_INSTALL_LOCALSTATEDIR:UNINITIALIZED=/var

//No help, variable specified on the command line.
CMAKE_INSTALL_PREFIX:UNINITIALIZED=/usr

//No help, variable specified on the command line.
CMAKE_INSTALL_RUNSTATEDIR:UNINITIALIZED=/run

//No help, variable specified on the command line.
CMAKE_INSTALL_SYSCONFDIR:UNINITIALIZED=/etc

//No help, variable specified on the command line.
CMAKE_SKIP_INSTALL_ALL_DEPENDENCY:UNINITIALIZED=ON

//No help, variable specified on the command line.
CMAKE_VERBOSE_MAKEFILE:UNINITIALIZED=ON

//No help, variable specified on the command line.
FETCHCONTENT_FULLY_DISCONNECTED:UNINITIALIZED=ON

########################
# INTERNAL cache entries
########################

//This is the directory where this CMakeCache.txt was created
CMAKE_CACHEFILE_DIR:INTERNAL=/build/reproducible-path/libdecaf-1.0.2/obj-aarch64-linux-gnu
//Major version of cmake used to create the current loaded cache
CMAKE_CACHE_MAJOR_VERSION:INTERNAL=4
//Minor version of cmake used to create the current loaded cache
CMAKE_CACHE_MINOR_VERSION:INTERNAL=1
//Patch version of cmake used to create the current loaded cache
CMAKE_CACHE_PATCH_VERSION:INTERNAL=1
//Path to CMake executable.
CMAKE_COMMAND:INTERNAL=/usr/bin/cmake
//Path to cpack program executable.
CMAKE_CPACK_COMMAND:INTERNAL=/usr/bin/cpack
//Path to ctest program executable.
CMAKE_CTEST_COMMAND:INTERNAL=/usr/bin/ctest
//Name of external makefile project generator.
CMAKE_EXTRA_GENERATOR:INTERNAL=
//Name of generator.
CMAKE_GENERATOR:INTERNAL=Unix Makefiles
//Generator instance identifier.
CMAKE_GENERATOR_INSTANCE:INTERNAL=
//Name of generator platform.
CMAKE_GENERATOR_PLATFORM:INTERNAL=
//Name of generator toolset.
CMAKE_GENERATOR_TOOLSET:INTERNAL=
//Source directory with the top level CMakeLists.txt file for this
// project
CMAKE_HOME_DIRECTORY:INTERNAL=/build/reproducible-path/libdecaf-1.0.2
//Name of CMakeLists files to read
CMAKE_LIST_FILE_NAME:INTERNAL=CMakeLists.txt
//number of local generators
CMAKE_NUMBER_OF_MAKEFILES:INTERNAL=1
//Path to CMake installation.
CMAKE_ROOT:INTERNAL=/usr/share/cmake-4.1

dh_auto_configure: error: cd obj-aarch64-linux-gnu && DEB_PYTHON_INSTALL_LAYOUT=deb PKG_CONFIG=/usr/bin/pkg-config cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=None -DCMAKE_INSTALL_SYSCONFDIR=/etc -DCMAKE_INSTALL_LOCALSTATEDIR=/var -DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON -DCMAKE_FIND_USE_PACKAGE_REGISTRY=OFF -DCMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY=ON -DFETCHCONTENT_FULLY_DISCONNECTED=ON -DCMAKE_INSTALL_RUNSTATEDIR=/run -DCMAKE_SKIP_INSTALL_ALL_DEPENDENCY=ON "-GUnix Makefiles" -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_INSTALL_LIBDIR=lib/aarch64-linux-gnu .. returned exit code 1
make: *** [debian/rules:15: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
--------------------------------------------------------------------------------
Build finished at 2025-08-30T03:35:38Z

-------------------------------------------------------------------------------

The above is just how the build ends and not necessarily the most relevant part.
If required, the full build log is available here (for the next 30 days):
https://debusine.debian.net/artifact/2399985/

The most likely cause of build failures is the removed backwards compatibility for
CMake versions earlier than 3.5. You can find additional information in my
debian-devel announcement:

https://lists.debian.org/debian-devel/2025/04/msg00310.html

About the archive rebuild: The build was made on debusine.debian.net,
using sbuild.

You can find the build task here:
https://debusine.debian.net/work-request/153724/

If this is really a bug in one of the build-depends, please use
reassign and affects, so that this is still visible in the BTS web
page for this package.

Thanks,
Timo